Notices
Results 1 to 5 of 5

Thread: Re-binding CO2

  1. #1 Re-binding CO2 
    Forum Bachelors Degree CEngelbrecht's Avatar
    Join Date
    May 2011
    Location
    Scania, Sweden
    Posts
    428
    Let's say it's somehow technically possible to bind huge ammounts of atmospheric CO2 back into the Earth's crust, this without pissing even more CO2 into the atmosphere, spending energy to bind it. Has anyone done the math as to how many tons of CO2 is necessary to bind, to get the atmospheric level down to, say, 300ppm, as with pre industrial age? How might that work, practically speaking?


    "The suppression of uncomfortable ideas may be common in religion or in politics, but it is not the path to knowledge, and there's no place for it in the endeavor of science. (History) shows us clearly that accepted and conventional ideas are often wrong, and that fundamental insights can arise from the most unexpected sources."
    - Carl Sagan, 1980


    Reply With Quote  
     

  2.  
     

  3. #2  
    exchemist
    Join Date
    May 2013
    Location
    London
    Posts
    2,873
    Quote Originally Posted by CEngelbrecht View Post
    Let's say it's somehow technically possible to bind huge ammounts of atmospheric CO2 back into the Earth's crust, this without pissing even more CO2 into the atmosphere, spending energy to bind it. Has anyone done the math as to how many tons of CO2 is necessary to bind, to get the atmospheric level down to, say, 300ppm, as with pre industrial age? How might that work, practically speaking?
    From a quick web search I find an estimate of 3 x 10 tonnes of CO2 in the atmosphere currently. As it is about 400ppm now, that would on the face of it mean sequestering around of 7.5 x 10 tonnes of CO2.

    But unfortunately the real number is probably a lot higher than this, as the oceans absorb a large proportion of the emitted CO2, so that what we see in the atmospheric rise is that proportion that the oceans have not yet been able to absorb. If one were to bring the atmospheric CO2 down, I imagine the ocean would start to release dissolved CO2 again. So I can't work out the real number I'm afraid.

    Interestingly about 90% of the CO2 at or near the Earth's surface seems to be in the oceans.


    Reply With Quote  
     

  4. #3  
    Forum Bachelors Degree CEngelbrecht's Avatar
    Join Date
    May 2011
    Location
    Scania, Sweden
    Posts
    428
    What exactly would be an efficient process to extract tons of CO2 from air? Can it be done exclusively with renewable electricity as a power source? And what "product" would come out of it, and can it just be dropped into deep pits around the world?

    I know, I'm sounding like a five year old, but...
    "The suppression of uncomfortable ideas may be common in religion or in politics, but it is not the path to knowledge, and there's no place for it in the endeavor of science. (History) shows us clearly that accepted and conventional ideas are often wrong, and that fundamental insights can arise from the most unexpected sources."
    - Carl Sagan, 1980


    Reply With Quote  
     

  5. #4  
    Bullshit Intolerant PhDemon's Avatar
    Join Date
    Feb 2013
    Location
    Newcastle-upon-Tyne, UK
    Posts
    4,711
    CO2 is an acidic gas, reacting it with a base would be the most efficient removal process. If a calcium based base were used the product would be calcium carbonate. The sheer amount of CO2 though makes this an unfeasible method for removing significant amounts.
    Reply With Quote  
     

  6. #5  
    Forum Cosmic Wizard
    Join Date
    Aug 2013
    Location
    San Diego
    Posts
    2,100
    Quote Originally Posted by CEngelbrecht View Post
    What exactly would be an efficient process to extract tons of CO2 from air?
    Use algae and sunlight to convert CO2 and water to biomass, then use high temperature processes to convert that to oil. Then store the oil.
    Reply With Quote  
     

Similar Threads

  1. odorant binding
    By llyneth in forum Biology
    Replies: 1
    Last Post: September 21st, 2012, 09:12 AM
  2. odorant binding
    By llyneth in forum General Discussion
    Replies: 0
    Last Post: September 21st, 2012, 06:20 AM
  3. DNA binding constant
    By sukhoi_mki in forum Biology
    Replies: 0
    Last Post: April 10th, 2008, 06:46 AM
  4. binding energy
    By EV33 in forum Physics
    Replies: 6
    Last Post: March 26th, 2008, 12:30 PM
  5. Dynamic Binding
    By soccer022483 in forum Computer Science
    Replies: 1
    Last Post: July 22nd, 2005, 02:37 AM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •